EVENT 201 Mixed 09 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Emmeline GLEAVE | 10 | Grantham | 7:44.46 |
| 4 | 2 | Hollie-Ann CROOK | 11 | Grantham | 7:32.70 |
| 5 | 3 | William PENNOCK | 11 | Grantham | 7:25.63 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Lydia EVANS | 12 | Co Lincoln P | 7:15.00 |
| 2 | 5 | Ruby NISBET | 11 | Newark | 7:15.00 |
| 3 | 6 | Thomas KINNEAR | 14 | Grantham | 7:01.03 |
| 4 | 7 | Leila MARANDI | 11 | Retford | 6:45.69 |
| 5 | 8 | Olivia CHARITY | 13 | Grantham | 6:45.00 |
| 6 | 9 | Madeline SURTEES | 12 | Grantham | 6:45.00 |
| 7 | 10 | Luiza KOZIOL | 17 | Lincoln TSA | 6:30.00 |
| 8 | 11 | Elliot MCWHIRTER | 15 | Lincoln TSA | 6:30.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Yu Ching (Eugene) CHEU | 14 | Grantham | 6:30.00 |
| 2 | 13 | Lucy ABBOTT | 13 | Grantham | 6:24.35 |
| 3 | 14 | Lottie Ava FLATTERS | 13 | Deepings | 6:22.94 |
| 4 | 15 | Robyn STEEL | 12 | Co Lincoln P | 6:21.89 |
| 5 | 16 | Katherine FLETCHER | 12 | Loughborough | 6:12.60 |
| 6 | 17 | Iris FRENCH | 15 | Lincoln Vulc | 6:10.17 |
| 7 | 18 | Lexie SHEWAN | 15 | Grantham | 6:08.38 |
| 8 | 19 | Lucy TONGUE | 14 | Ripley | 6:00.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Callum LOYNES | 13 | Co Lincoln P | 5:45.00 |
| 2 | 23 | Ben CARLYLE | 15 | Grantham | 5:06.83 |
| 3 | 25 | Daniel DEGNAN | 17 | Grantham | 5:02.47 |
| 4 | 27 | James DOBNEY | 21 | Grantham | 4:48.00 |
| 5 | 26 | Benjamin ROBERTS | 16 | Grantham | 4:48.00 |
| 6 | 24 | Benjamin DERBY | 16 | Lincoln Vulc | 5:02.85 |
| 7 | 22 | Annabelle JAY | 13 | Grantham | 5:37.85 |
| 8 | 20 | Grace HOWITT | 16 | Grantham | 5:59.42 |